Objective: to explore the causes of intrauterine fetal distress and to evaluate physiologic and pathological circumstances of intrauterine fetus with B-ultrasound.

目的通过B超探讨胎儿宫内窘迫的原因，判断胎儿宫内生理病理状态及预后。

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Conclusion After severe intrauterine fetal distress, changes of free radicals occurred in brains firstly, which provides the proof of early treatment for neonatal hypoxia ischemia brain damage.

肝组织均未发生显著变化。结论宫内窘迫时，脑组织首先出现自由基变化，为新生儿缺血缺氧性脑损伤的早期防治提供了理论依据。

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Results: the abnormal fetal heart rate and fetal movements are important indexes for determining prenatal anoxia, abnormal umbilical cord and amnion are the main causes of intrauterine fetal distress.

结果：胎儿心率、胎动异常是判定胎儿有无缺氧和缺氧程度的主要指标；而脐带、羊水异常是造成胎儿宫内窘迫的主要原因。

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